Color film with sound record



Patented Nov. 7, 1939 Q Wilhelm Schneider, Dessau, Anhalt, Germany, assignor, by mesne assignments, to Agfa Ansco Corporation, Binghamton, N. Y., a corporation offf Delaware present invention relates Zto the manufacture oi color sound films.,-.. I g

Oneof its objects is an-improved process of producing multi-color sound films from films with silver halide emulsion, layers containing dyestufi components, which produce color in thedeveloper. Further. objects will; be seenfrom the following detailed specification.

Processes are known for making a subtractive multi-color film inwhich the component color pictures contained in several superimposed layers consist onlyof dyestuffsanddo not contain any I silver or other metal. A process of this kind is indeed very suitable for the production of picture films, but difiiculty is experienced in applying it in the production of a sound track because the hitherto usual suond reproducing apparatus are sensitive above all to infra-red rays and the pure dyestuff pictures are transparent to infra-redrays even when, owing to the superimposition of all three component colors, they yield a black which appears externally equivalent to the silver precipitate. Consequently the sound reproduction is affected to an extraordinary degree and attempts must be made to render the sound track impermeable for infra-red rays even in films containing pictures composed only of dyestuffs.

This invention is based on the observation that for this purpose there is particularly suited the e process of color development advantageously with use of components which are fast to diffusion such as are described, for example, in U. S. patent applications Ser. No. 10,704 filed March 12, 1935; Ser. No. 111,250 filed November 17, 1936; Ser. No. 72,718 filed April 4, 1936; Ser. No. 90,726 filed July 15, 1936; Ser. No. 94,340 filed August 5, 1936 Ser. No. 141,093-fi1ed May 6,1937. Any desired multi-color original is first printed onto a copying film having three superimposed layers of which each one. contains a dyestuff component which is fast to diffusion. The multi-color original may itself have been produced by the process of color development or by any other known process, for example by imbibition printing, by the Indigosol process, with the aid of the dyestuff-bleaching-out-process or with the aid of the silver-bleaching-out color process. Instead of an original which is itself directly colored there may be used as the original a lentlcular negative 50 with interposition in known manner of the usual multi-color filter; or copies may be made from any desired component color records, which are taken, for instance, by means ofbi-pack or multi pack or a system for dividing the light rays or 55 slide-cameras.

n )1 .No Drawing. Application August 26, 1937, Seria' v ".JNOL 161,056. In Germany September 8, 1936 5, Claims. (01. 95-2) The. latent image produced in the multi-layer film by this copying process is then developed by chromogenic development'to produce a colored positive picture and the metallic silver which is formed is thereafter dissolved in known manner. 5

Owing to the use of coupling components fast to diffusion in the three component layers the color development proceeds very rapidly, simply and automatically.

After development the undeveloped silver halide 10 .is not fixed, but a sound negative made by any desired process is now printed on the margin of the still wet or previously dried copying film.

The sound track is now developed in an ordinary black-and-white developer, for example hydro- 5 quinone.

Since-a developer of this kind does not react with the coupling components contained in the layers in the area of the sound track there is produced a black silver sound record. For develop- 20 ing the sound record the whole film may be treated with a black-and-white developer or the film may only be brought into contact with the developer in the sound track area; for this purpose, for example, the film may be inclined dur- 25 ing the development so that only the area of the sound track dips into the developing liquid, or the effect of the black-and-white developer on the finished picture area can be avoided by means of one of the usual resists. 30

All the undeveloped silver halide still contained in the layers is now fixed in the usual manner. After washing there is obtained a picture-sound film having a subtractive multi-color picture consisting only of dyestuffs together with 35 a black silver sound track.

The process may be modified by fixing the film in the picture area after color development and dissolution of the developed metallic silver, then printing the sound record on the unaltered mar- 40 gin of the film and finally developing and fixing in the manner above described.

There is advantageously used-for developing the sound record a black-and-white developer which does not alter the silver halide present in the picture area.

The following example illustrates the invention:

A multi-layer material is used provided with three superimposed silver halide gelatin emulsion layers which are arranged on one side of the support. The layer next to the support is panchromatically sensitized and contains a dyestuff component capable of forming a blue-green dyestuff with the developing agent. a-hydroxya yellow dye by the chromogenic development.

The single component color records are first printed onto this film with interposition of suit able light filters. After the exposure the dyestufl picture is produced in all three layers at the same time in one step by only one developing agent, as for example p-aminodimethylaniline. There are advantageously used as original the component color records produced by a systemior dividing the rays of a multi-pack, since in this case a highly sensitive material may be used for the exposure. The sound track is then printed and developed such as described above.

What I claim is:

1. A process of producing multi-color sound films, which comprises producing a multi-layer film having incorporated in the several silver halide gelatin emulsion layers dyestufi components which, though soluble in aqueous liquids, are fast to diffusion and capable of forming dyestuffs with a developer adapted for color development, said several layers being sensitive to different colors, exposing said multi-layer film to a color picture image while protecting a marginal portion of the film for the sound record, developing all said layers in a single process in a developer capable of forming dyestuffs with said dyestufi components, bleaching the produced metallic silver, printing a sound negative on said marginal portion of said film while protecting the picture portion of the film from furtherexposure, developing the sound track in a blackand-white developer, and removing all the undeveloped silver halide still contained in said layers.

2. A process of producing multi-color sound films, which comprises producing a multi-layer film having incorporated in theseveral silver halide gelatin emulsion layers dyestuif components which, though soluble in aqueous liquids,

are fast to diffusion and capable of forming dyestufis with a developer adapted for color development, said several layers being sensitive to difi'er ent colors, exposing said multi-layer film to a color picture image while protecting a marginal portion of the film for the sound record, developing all said layers in a single process in a developer capable of forming dyestufis with said dyestufi components, bleaching the produced metallic silver, fixing said film in the picture area, printing a sound negative on said marginal portion of said film while protecting the picture portion 01' the film from further exposure, de-

veloping the sound track' in a biack-and-white developer, and removing all the undeveloped silver halide still contained in said layers.

3. A process of producing multi-color sound films, which comprises producing a multi-layer layers.

film having incorporated in the several silverhalide gelatin emulsion layers dyestufif components which, though soluble in aqueous liquids, are fast to diffusion and capable of forming dyestufis with a developer adapted for color development, said several layers beingsensitive to different colors, printing component color records on said multi-layer film while protecting a marginal portion of the film for the sound record, developing all said layers in a single process in a developer capable of forming .dyestufis with said dyestufi components, bleaching the produced metallic silver, fixing said film in the picture area, printing a sound negative on said marginal portion of said film while protecting the picture portion of the film from further exposure, developing the sound track in a blackand-white developer, and removing all the undeveloped silver halide still contained in said layers.

4. A process of producing multicolor sound films, which coiiprises producing a multi-layer film having incorporated in the several silver halide gelatin emulsion layers dyestufi' components which, though soluble in aqueous liquids, are fast to diifusion and capable of forming dyestuffs with a developer adapted for color development, said several layers being sensitive to diflerent colors, exposing said multi-layer film to a .color picture image while protecting a marginal portion of the film for. the sound record, developing all said layers in a single process in a developer capable of forming dyestufis with said dyestuff components, bleaching the produced metallic silver, fixing said film in the picture area, drying said film, printing a sound negative on said marginal portion of said film while protecting the picture portion of the film from further exposure, developing the sound track in a blackand-white developer, and removing all the undeveloped silver halide still contained in said layers.

5. A process of producing multi-color sound films, which comprises producing a multi-layer film provided with three superimposed silver halide gelatin emulsion layers on one side of the support, the layer next to said support being panchromatically sensitized and containing hydroxynaphthoic acid dibenzidide, the second layer being sensitized to green and containing 1.4'-palmitoylamino-phenyl-3-methyl -5-pyrazolone, the upper layer being not particularly sensitized and containing benzoylacetic ester benzidid, exposing said multi-layer film to a color picture image while protecting a marginal portion of the film for the sound record, developing all said layers in a single process in a developer containing p-aminodimethylaniline, bleaching the produced metallic silver, fixing said film in the picture area, printing a sound negative on said marginal portion of said still wet film while protecting the picture portion of the film from further exposure,developiiig the sound track in a hydroquinone developer, and removing all the undeveloped silver halide still contained in said WILHELM SCHNEIDER. 

